Gripping-die for wire-nail machines



(No Model.) 7 2 SheetsSheet 1.

W. TAYLOR.

GRIPPING DIE FOR WIRE NAIL MACHINES. I 1 No. 511,174. Patented Dec. 19,1893.

{No Model.) 2 sheets-sheet '2 W. TAYLOR.

GRIPPING DIE FOR WIRE NAIL MACHINES.

No. 511,'174. Patented Dec. 19, 1893.

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NIT ED STATES PATENT 'FFEQE,

WILLIAM TAYLOR, OF ALLEGHENY, PENNSYLVANIA.

GRlPPlNG-DIE FOR WIRE-NAIL MACHINES.

SPECIFICATION forming part of Letters Patent No. 511,174, dated December19,1893.

Application filed June 24,1892. Serial NOABLQOQ, (No model.)

To 0. whom it may concern:

Be it known that I, WILLIAM TAYLOR, a citizen of the United States,residing at Allegheny, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inGripping-Dies for lVire-Nail Machines, of which the following is aspecification, reference being had therein to the accompanying'drawings.

Figure 1 represents a rear or back view of a die box containing threeadjustable and detachable gripping dies arranged at an angle of sixtydegrees to each other; Fig. 2, an edge View of said die box properlysecured to an immovable and substantial portion of a nail machine; Fig.3, a transverse vertical and central section of the same; Fig. 4, a rearor back view of a die box containing these adjustable dies arranged atright angles to each other,

together with their means of adjustment.

gripping dies consisted of two parts arranged on the some plane andoperating in the same direction, and, one or both of such dies weregrooved conformably to the size and shape of the wire, requiring acomplete change of dies for each wire of difierent size and shape.

I That construction necessitated not only a stoppage of the nailmachine, but a detachment of the die box, a removal of the old (lies, asubstitution of different dies, and a replacement of the die box, all ofwhich consumed much valuable time and labor.

advantage in the use of dies constructed with angular grooves, for thecorners of such dies soon become filled and rounded with accumu ver on anail machine.

lated scale or other hard remaining matter that mars the wire.Consequently the nails have not that nice sharp angularity of edge andfinished appearance as is at present required by the trade.

The object of my invention is to provide wire nail machines withgripping dies that admit of being easily adjusted to serve and firmlyhold several difierent sizes of wire with equal force, which dies areespecially constructed and adapted to grip and hold triangular wireswithout mutilation of or interference with the corners or edges thereof,thus enabling the nail to retainall the smoothness and sharpness ofoutline possessed by its initial wire; To that end I prepare a suitabledie box 1 having cut therein the deep parallel sided grooves 2 arrangedat an angle of sixty degrees to each other, all meeting and terminatingin a hole extending transversely through the center of the die box.Within each groove 2 is placed and nicely fitted a separate die 3consisting of an oblong rectangular block of hardened steel having itsapproximate ends provided with a series of small serrations or nicks 4.The two upper dies are severally adjusted toward and from each other andthe nearest end of the third die by means of suitable screws 5 properlyapplied for the purpose of regulating the position of such dies withrespect to a triangular wire 6 they areintended to hold. The verticaldie is larger than its companion its lower end being below and outsidethe die box, so that it may be connected and operated within short rangeby means of a le- The adjacent ends of the several dies have theircorners beveled or taken off, making the faces comparatively narrow, sothat when the dies grip a triangular wire they only operate against itsthree plain sides, permitting its corners or acute edges to projectoutward in the spaces between the beveled portions of the dies, wherebythe sharp corners of the wire avoid compression and are thus preservedin their original condition. The die box 1 with its complement of diesis firmly secured to the thrust block 7 of a nail machine by means ofsuitable screws 8 that pass through the same and requisite holes 9 insaid die box. A recess 10 formed in the face of the latter exposes theinner ends of the dies and permits a properly constructed heading ram tostave a head on the projecting end of a wire caught between them. Thesmall serrations or teeth 4 in the contiguous ends of the dies verymaterially assist in holding the wire and prevent its being driven backby the force orimpact of the heading ram. As the wire is intermittinglyfed through the hole 11 in the thrust block 7 and onward between thedies, it is seized at the proper moment by the upward closing movementof the lower die, and retained by a powerful grip until a head has beenformed on the wire by any ordinary heading punch, as is indicated at 23,Fig. 8. The lower die will then recede permitting another advance of thewire to be headed, pointed, and severed from its initial stock after themanner peculiar to all wire nail machines.

Dies arranged at an angle of sixty degrees, to successfully grip smallwire should have their operative ends beveled as shown in the drawingFig. 5.

Although I have described a die box with dies therein, that work well, Iprefer the arrangement illustrated by the drawing Fig. 4 whichrepresents a die box 12 containing two dies 13 that occupy the samehorizontal plane, and another or third die 14 which is arranged at rightangles or perpendicular thereto. The two horizontal dies 13 are providedwith oblique inner ends, and the vertical die 14 has a right angledface, the three together conforming to the shape of a triangular wire 15inserted between them and on which they are intended to operatesubstantially in the same manner as those first hereinbefore described.The vertical die 14 is moved up and down to grasp and "release the wire15 at proper times by means of an ordinary gripping lever 22, such, forinstance, as is shown in Patent No. 355,631, dated January 4, 1887, andwhile operating, the horizontal dies 13 remain stationary, but areseverally adjustable, each by means of a screw 16 supported in asubstantial bracket 17 detachably secured to the die box 12 by a strongbolt 18 in such manner as will permitthe bracket and adjusting screws 16to be turned aside exposing and releasing that particular horizontaldie, which may then be readily withdrawn without interference ordisturbance of the die box or either of the other dies. A portion of thedie box 12 is represented as broken away, and oneof the brackets 17attached thereto is shown in vertical section to fully exhibit itssupporting bolt and screw for adjusting the die. The die box 12 with itsseveral dies is intended to be fastened and used in a wire nail machine,and for that purpose it is provided with a requisite number of boltholes 19 which are arranged at different convenient points.

It will be understood that the movable parts herein referred to areactuated by any of the devices in the wire nail machines of this class,which at this time are well known. In such machines, the movablegripping die is always so actuated, as that after being moved to theinnermost gripping position it is held there stationarily underpressurefor an appreciable interval of time while the heading punch or rain isapplying its pressure longitudinally of the wire.

I am aware that for many years it has been very common to use lathechucks each having a continuously rotating head with jaws mountedtherein and rotating therewith for holding a tool or other purposes, andI do not claim such devices as of my invention; but the differen cesbetween such chucks and a wire nail machine having the devices hereinshown will be readily understood, as will also the fact that therotation of the parts which in-a chuck is entirely essential would bedisastrous in a nail machine, particularly one which receives triangularwires.

Having thus described my invention, I

claim-.

1. In a machine for making wire nails, the combination of a stationarydie box orholder, three non-rotatable separate dies mounted in said boxat an angle to each other, and of which all are held stationary duringthe headin g operation, and one is movable toward and from the others,whereby all are adapted to intermittingly engage with the side facesrespectively of a triangular wire, substantially as set forth.

2. In a machine for making triangular wire nails, the combination of thethrust block, the wire passage, the non-rotating die holder,-and thethree non-rotating dies in said holder arranged on differentradiirelative to the axis of the wire guide and adapted to respectivelyengage intermittingly with the side faces of a triangular wire, andhaving wire engaging faces narrower than the faces or sides of the wire,substantially as set forth.

3. In a wire nail machine, the combination of a stationary die box,three non-rotating dies therein at an angle to each other, a thrustblock behind the said die box and secured thereto, said die box having awire .passage through which the wire can pass from the side on which thethrust block is situated to the dies, and a header movable toward andfrom the thrust block and bearing against the wire longitudinallythereof when gripped by the dies, substantially as set forth.

4. The combination in a wire nail'machine of the die box or holder, andthe three nonrotating dies arranged on different radii rela tive to thewire passage, all held stationary relative to said passage during thegripping operation, and means forintermittinglymoving one of said diesduring said operation to ward and from the others,substantially as setforth.

5. In a wire nail machine, the combination of a non-rotary die box orholder, two gripping dies separately mounted in said box havingoppositely inclined wire engaging faces and independently adjustable onsubstantially the same diametric lines and a third movable die situatedtransversely to said lines which are stationary during the headingoperation and having its operative end adjacent to the ends of the twoaforesaid dies, whereby all are adapted to intermittingly engage withthe side faces respectively of a triangular wire, substantially assetforth.

6. In a wire nail machine, the combination of a non-rotating die box orholder, two gripping dies separably mounted therein and adjustable onsubstantially the same lines and having their operative ends or facesinclined to the said lines, and a third movable die which is stationaryduring the heading operation and is arranged transversely to the saidlines and having its operative end or face substantially parallelthereto, whereby all are adapted to intermittingly engage with the sidefaces respectively of a triangular wire, as set forth.

In testimony whereof I allix my signature in presence of two witnesses.

WILLIAM TAYLOR.

Vitnesses:

NORMAN DIEHL, CLIFFORD M. DIEHL.

